Skiving-machine.



E. E. LANE.

SKIVINQ MACHINE. :APPLICATION FILED JULY I9. 19x5.

1360,55. Patnted Mar. 26, 1918.

3 S H E ETSS H E ET I IIiL E LANE. SKIVING MACHINE.

APPLICATION FILED JULY 19, I915.

Pafented Mar. 26, 1918.

3 SHEETSSHEET 2.

E. E. LANE.

SKIVING MACHINE.

APPLICATIQN FILED JULY 19. 1915.

- Patented Mar. 26, 1918.

|| lllllll 3 SHEET PATNT f h lfiEo ELMER E. LANE, OF BEVERLY, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS,

. T0 UNITED SHOE MACHINERY CORPORATION, OF

PORA'I'ION OF NEW JERSEY.

PATERSON, NEW JERSEY, A COR SKIVING-MACHINE.

Specification of Letters Patent.

Patented Mar. 26, 1918.

Application filed July 19, 1915. Serial No. 40,679.

To all '10 ham it may concern Be it known that I, ELMER E. LANE, a citizen of the United States, residing at Beverly, in the county of Essex and State of ldassachusetts, have invented certain new and useful Improvements in Skiving-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to skiving machines and more particularly to a method of and apparatus for skiving blanks stiffened with a filler which becomes sticky when heated.

In the manufacture of boots and shoes certain of their parts, such as the toe and heel, are supported by stiffeners, a box toe being used at the toe and a counter at the heel. The box toe and counter are placed inside the upper and united with the sole to hold them firmly in place. These stiffeners are skived off to a feather edge on their border so that they may be secured in place without any bumps or laps to give a smooth, finished appearance to the shoe. The stifi'eners are often made of a porous fabric material filled with shellac or similar composition which makes the fabric hard and stiff at ordinary temperatures. This fabric may be softened by solvents or heat to allow it to be molded into shape and, after being molded, is allowed to harden in its finished form. The stiffener blanks are skived while the fabric is stifl and hard, and the treatment of the blank in the skiving machine forms considerable dust and waste. The skiving operation creates sufficient heat to make the dust and waste sticky, so that it adheres to the skiving roll and knife. Any waste that might stick in the cavity or matrix of the skiving roll will modify the character of the skiving of the blank and, in many cases, require the skived blank to be discarded and the machine stopped to clean the parts.

The primary object of the present inven tion is to provide a skiving machine in which blanks containing a filler that be comes sticky when heated may be successfully skived without the interference of waste material formed in the skiving operation.

In accordance with this object, one feature of the invention contemplates the provision in. a skiving machine of means to moisten the surface of a roll to cool it, and assist in keeping it clear of waste material formed in the skiving operation. The use of an excess of water in cooling the skiving parts tends to wash the dust formed from the skiving operation into the bearings of the die or matrix roll. To avoid the use of an excess of water, the preferred embodiment of this feature of the invention contemplates applying moisture only to the die roll. To employ a minimum amount of water required to cool the parts, the best form of the invention that has been devised consists of a device to direct a spray of water only into the cavity or matrix of the die roll.

Another feature of the invention contemplates a method of skiving blanks which have a stiffening filler that becomes sticky when heated comprising, supporting the blanks for a predetermined type of cut, skiving the blanks when so supported, and cooling the operating parts to prevent the waste of the skiving operation from adhering to the parts. The stiffened blanks are not affected by and do not absorb water, so that the application of a film of water directly on the blank to be carried to the parts or placed on the machine between the blank and the matrix of the die roll, or between the blank and the skiving knife, will act to keep the machine parts cool. When the parts are cool, the waste does not become sticky and the water acts as a lubricant to keep the parts clear of waste.

A further feature of the invention contemplates the provision in a skiving ma chine of means for moistening a roll and means for controlling the amount of nioisture delivered to the roll. By delivering only a sufiicient quantity of water to moisten the cavity of the die roll, the dust of the skiving operation is not washed into the bearings of the skiving rolls, and an economical use of water is insured. In the preferred form of this feature of the invention, the means for controlling the quantity of liquid delivered to the die roll also controls the time in Which the liquid is delivered to the die roll. Since the cavity of the die roll is that portion which is most liable to be clogged with waste, the liquid controlling means is timed so as to deliver liquid only to the cavity of the roll.

Other features of the invention relate tocertain devices, combinations and arrangements of parts hereinafter described and claimed, the advantages of which vill be apparent to those skilled in the art.

The features oi the invention will be clearly understood from an inspection of the accon'ipanying drawings, in which Figure l is a view in side elevation of a skiving machine embodying the preferred form oil the invention; Fig. 2 is a longitudinal sectional view of the upper portion of the machine; Fig. is a view in front elevation showing the moistening device assembled and its attachment to the machine trams, and Fig. at is a detail view partly in section, showing the coi'istruction of the liquid regulator.

The machine illustrated in the drawings has substantially the same construction, arrangen'ient and mode of operation as the machine illustrated in the patent to Scott No. 969,987, patented September 13, 1910. This machine is provided with -a positively driven die roll 10 and pressure roll 12 between which extends the cutting edge of a skiving knife 1 1, so that the skiving cut will be made at approximately the line of contact of the die and pressure rolls with a blank. The blanks are supported in a hopper 16 and held in a flat position by afollower 18. A reciprocating feed slide 20 having a pushing blade feeds the blanks one at a time to the skiving rolls. In the skiving operation, the blanks pass between the pressure and die rolls and the pressure roll forces the blanks down into a matrix or cavity of the die roll, which has the shape of the article to be produced, and as a blank is carried along by the rolls, the skiving knife acts to trim oil the excess material while the blank is supported in the cavity. The parts above referred to are he same as the parts shown and described in said patent, to which reference is hereby made for a detailed description of their construction and operation.

The blanks from which the shoe stitl'eners are made, may consist of a fibrous or feltv material which is. saturated with a filling composition to give it a hard, stilt structure. The filling composition consists of shellac modified with various ingredients to lower its melting point, and the composition thoroughly permeates the blank. When the stiff blank isforced intothe cavity of the die roll by the pressure roll, the pressure tends to crack it, and forms considerable dust. A further amount of dust and waste scraps is formed by the action of the -skiving knife. The frictionof feeding, pressing the blank into the die roll cavity, and cutting the skiving creates sufficient heat to melt the fine dust particles, so that they stick to the parts with which they come in contact. To prevent the dust and waste material evolved in the skiving operation from be coming sticky, the skiving parts are cooled below the temperature of the melting point of the filling dust so that the material does not adhere to the operating parts and interfere with the operation of the machine. For cooling the skiving mechanism, a spray of water is directed against the bottom of the cavity roll by a nozzle 24:, which is connected by means of tubes 26 and 28 with a pressure pump 30 for supplying liquid under pressure. The nozzle 24: is the ordinary type of spraying nozzle which is constructed to break up the moistening liquid into fine particles and direct a stream of a predetermined .cross-section against the die roll. A drip tank 32 is mounted on the machine frame below the die roll 10 in a position to catch any excess liquid which may fall from the die roll, and the drip tank is connected by a tube 34: with a reservoir 36 mounted at the side of the machine frame. Any liquid caught in the drip tank 32 is filtered by a fibrous material 38, conducted through the tube 3st into the reservoir 36, and from the reservoir it passes to the pump 30 by a connecting tube 10. The reservoir 36 and pump 30 are supported upon a bracket 12 attached to the side of the machine frame below the main driving shaft. The pump 30 is the ordinary type of rotary pump, and is provided with a pulley 4:3 which is connected to a pulley 4: 1 on the main driving shaft by a belt 16; see Fig. 3.

Since the cavity of the die roll is the portion that is most liable to become gummed with dustand waste and thereby interfere with the skiving ope 'ation, the moistening liquid is intermittently sprayed into the die roll cavity. The moistening liquid has a washing or lubricating action as well as a cooling action which aids in keeping the cavity clear of waste. The quantity of liquid required to moisten the cavity of the die roll is suiiicient to keep the skiving parts cool enough so that the dust will not stick to them. This application or moistening liquid is important because the die roll is :keptclear of waste, the moisture from the cavity is carried by the blank to the other skiving parts, and the liquid is not spread over the entire roll to wash dust into the bearings. To insure that the water may be placed only in the cavity of the die roll, the water is admitted to the nozzle intermittently and at the time the cavity is directly opposite the nozzle. The admission of n oisteninjg liquid to the nozzle is controlled by a regulator 4C8 (Figs. 2, .3 and at), which is connected between tubes 26 and 28 and acts as an automatic valve in openingand closing the liquid supply. The regulator 48 consists of a casing 50 with a cover 52 in which is rotatably mounted a valve plate 54. In assembling the regulator, a suitable packing is placed between the valve plate 551 and the casing, and the cover is secured in place by means of screws 56. The regulator is mounted on a shaft 58 which passes through the casing and valve plate and is journaled in a bracket 60 attached to the machine frame below the drip tank The valve plate 55+ is keyed to the shaft 58 and is rotatable therewith, but the casing is at tached to the bracket by means of a screw 62 (Fig, 3) placed in the bracket and cover plate The valve plate 54: rotated by a ratchet and pawl mechanism which is ac tuated by a connection with the feed slide of the skiving machine, and each reciprocation of the feed slide opens and closes the supply of liquid to the nozzle 24' The ratchet 64: is locked on the shaft 58, and beside it is loosely mounted a pawl lever 66 which carries a pawl 68 that engages with the ratchet 6A. The connections between the pawl lever 66 and the feed slide 20 comprise a link 86 connecting the free end of the pawl lever with the upper end of an arm 84:, a rock shaft 72 to which the arm 8% is secured, and an arm also secured to the rock shaft 7 2 and provided at its upper end with a slot 74 to receive the feed slide pin 7 6. The connection between the lever 84 and link86 is made adjustable to provide for timing the movement of the valve plate 54 in admitting liquid at the proper time to the cavity of the die roll.

The valve plate 5 1 of the regulator (Figs. 2 and 4:), has a series of openings 90 that are adapted to register with the open ends of the tubes 26 and 28 at their connection with the casing 50 and cover 52 respectively. The period of time in which an opening 90 of the plate 5st will remain in register with the tubes 26 and 28 to permit the moistening liquid to flow to the cavity roll, depends upon the action of the ratchet and its actuating mechanism. This may further be modified by changing the size of the openings 90 to admit a greater or smaller quantity of water, or by making the openings elongated so that they will admit water to the tubes 26 and 28 through a greater are of movement of the plate 5-.l. The connection of the regulator plate with the feeding mechanism may be accurately adjusted to admit moisture only when the cavity is directly opposite the nozzle, and the amount of water may be regulated to admit only a sufiicient quantity to completely moisten the cavity. After a blank has passed between the rolls and has been skived, the cavity of the die roll is left comparatively' dry and will be moistened again when it is opposite the nozzle 24. The film of liquid which is placed between the blank and the cavity of the die roll is sufiicient to keep the temperature of the cavity roll low enough to prevent the skivings and dust formed from becoming sticky, and thus obviate the interference of this material "ith the skiving operation.

Having described the preferred form of the invention, what is claimed as new is 1. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, and means for moistening the surface of one of the rolls to prevent the work from adhering to the roll.

2. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, and means for moistening the surface of the die roll.

3. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, and means for intermittently moistening the die roll.

4. A skiving machine having, in combi nation, a skiving knife, a pressure roll, a die roll, and means for moistening less than the entire surface of the die roll.

5. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, and means for directing a spray of liquid into the cavity only of the die roll.

6. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, means for moistening a roll, and means for controlling the amount of liquid supplied to the roll.

7. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, means for directing a spray of liquid on to the dieroll, a source of liquid supply, and a regulator for controlling the admission of liquid to the spraying means.

8. A skiving machine having, in combination, a skiving knife, a pressure roll, a die roll, means for directing liquid to the die roll, means for supplying liquid under pressure to the directing means, and a regulator between the supply and directing means for intermittently cutting oil the supply of liquid to the liquid directing means.

9. A skiving machine having, in combination, a skiving knife, a pressure roll, adie roll, means for feeding blanks to the rolls, a nozzle for spraying the die roll, a pressure pump, a tube connecting the pump with the nozzle, and a regulator in the tube operated by the feeding means for controlling the supply of liquid to the nozzle.

10. A skiving machine having, in combination, a skiving knife, a die roll, a nozzle below the die roll, a tube connecting the nozzle with the source of liquid supply, means for actuating the rolls, and means for admitting liquid to the nozzle only when the die cavity is opposite the nozzle.

11. A skiving machine having, in combi nation, a skiving knife, a pressure roll, a

die roll, a nozzle below the die roll, a tube connecting the nozzle with the source of liquid supply, a regulator mounted in the tube, feeding mechanism for supplying blanks to the feed rolls, operative connections between the feeding mechanism and the regulator, anc means for actuating the rolls and feeding mechanism.

12. A skiving machine having, in combination, skiving knife, pressure and die rolls, a nozzle for spraying the die roll having a tube connection with a pressure pump, a reservoir connected with the pressure pump, a drip tank under the die roll, and a return connection between the drip tank and reservoir.

13. The method of skiving blanks having a stiffening filler which becomes sticky when heated comprising, supporting the blanks for a predetermined type of cut, skiving the blanks when so supported, and cooling the operating parts to prevent the waste of the skiving operation from adhering to the parts.

14. The method of skiving blanks having a stiffening filler which becomes sticky when heated comprising, supporting the blanks for a predetermined type of cut, skiving the blanks when so supported, and applying a coating of water between the blanks and an operating part to prevent the skivings from adhering to the parts.

15. The method of skiving blanks having a stiflening filler which becomes sticky when heated comprising, supporting the blanks for a predetermined type of s iving, moving the supported blanks across a cutter, and cooling the supporting means to prevent the skived portion of the blanks from adhering thereto.

16. The method of skiving blanks having a stiffening filler which becomes sticky when Worked in a machine comprising, feeding a blank to a skiving mechanism provided with a matrix, forcing the blank into the matrix of the skiving mechanism, applying a film of moisture between the blank and the matrix, and skiving the blank near the line of contact of the matrix with the blank.

ELMER E. LANE.

(lenient of this patent may be obtained for five cents each, by addressing the commissign r of p Washington D. G. 

